
Product Description
Emerson VE4002S1T2B5 KJ3204X1-BA1 24 VDC High-Side Discrete Output Card
The Emerson VE4002S1T2B5 KJ3204X1-BA1 represents a high-density digital output solution for DeltaV S-series distributed control systems. This 32-channel high-side switching card delivers reliable 24 VDC control signals to solenoid valves, motor starters, indicator lamps, and pneumatic actuators across oil & gas, chemical processing, power generation, and water treatment facilities.
What Makes This Discrete Output Card Unique?
Unlike standard discrete output modules, the VE4002S1T2B5 employs high-side switching architecture where the output transistors connect between the positive supply rail and the load. This configuration provides superior fault detection capabilities compared to low-side switching, enabling precise diagnostics of open-circuit, short-circuit, and overload conditions on every channel.
High-Side Switching Benefits:
- Detects ground faults and wiring errors during commissioning
- Prevents false actuations from accidental ground shorts
- Enables current monitoring for predictive maintenance
- Simplifies troubleshooting with per-channel diagnostics
- Supports both sourcing and sinking load configurations
Technical Specifications at a Glance
| Output Channels | 32 independent high-side switches |
| Output Voltage | 24 VDC nominal (18-30 VDC operating range) |
| Current per Channel | 0.5A continuous, 1.0A surge (100ms) |
| Switching Type | High-side MOSFET with current limiting |
| Response Time | <5ms turn-on, <10ms turn-off |
| Isolation | 500 VAC channel-to-bus, 50 VAC channel-to-channel |
| Diagnostic Features | Open load, short circuit, overcurrent detection |
| Status Indication | Per-channel LED indicators (green=on, red=fault) |
| Operating Temperature | -40°C to +70°C ambient |
| Certifications | UL/CSA Class I Div 2, ATEX Zone 2, IECEx |
Where Is This Card Typically Deployed?
Solenoid Valve Control: Actuate pneumatic control valves, block valves, and vent valves in process control loops. The high-side switching architecture detects coil failures and wiring faults before they cause process upsets or safety incidents.
Motor Starter Interfacing: Provide start/stop commands to motor contactors and soft starters for pumps, fans, and agitators. Current monitoring capabilities enable predictive maintenance by detecting contactor coil degradation.
Annunciator Panel Driving: Control alarm lamps, tower lights, and HMI indicators in control rooms and field panels. Per-channel diagnostics ensure critical alarms are always functional and visible to operators.
Pneumatic Actuator Positioning: Drive I/P (current-to-pressure) converters and solenoid pilot valves for damper control, louver positioning, and variable geometry systems in combustion control applications.
How Does Fault Detection Work?
Each output channel incorporates intelligent diagnostics that continuously monitor load current and voltage drop. When an output is commanded ON, the card verifies that current flows within expected limits (typically 20-500mA for solenoid loads). If no current flows, an open-circuit fault is flagged. If excessive current is detected, a short-circuit or overload condition is reported to the DeltaV controller within one scan cycle.
This real-time fault detection enables immediate operator notification and automated fault response strategies, such as switching to backup equipment or initiating safe shutdown sequences. Diagnostic data is logged in DeltaV Event Chronicle for compliance reporting and root cause analysis.
What Are the Integration Requirements?
The VE4002S1T2B5 card mounts in DeltaV S-series I/O carriers including VE4070 LocalBus isolators and KL4104X1 dual-wide carriers. Field wiring terminates on VE4002S1T2B1 terminal blocks with spring-clamp or screw-terminal options. The card communicates via DeltaV LocalBus protocol at 1 Mbps, supporting up to 8 cards per carrier with automatic address assignment.
Compatible with DeltaV versions 11.3 through 15.1 LTS, the card supports online replacement (hot-swap) without system shutdown when configured in redundant I/O architectures. Configuration via DeltaV Explorer includes pre-built function blocks for pulse outputs, time-delayed outputs, and interlocked sequences.
Related DeltaV Discrete I/O Products
| Product Model | Description | Product Link |
|---|---|---|
| VE4002S1T2B6 | 32-Channel Discrete Output Card (Standard) | View Product |
| VE4002S2T2B8 | Discrete Output Plus Card (Enhanced Diagnostics) | View Product |
| VE4002S1T2B1 | DeltaV Discrete Output Terminal Block | View Product |
What's Included with Purchase?
Each VE4002S1T2B5 card ships factory-tested with firmware pre-loaded and includes installation documentation, wiring diagrams, and DeltaV configuration templates. Backed by 18-month warranty covering manufacturing defects and performance specifications. Technical support available for system integration, troubleshooting, and application engineering assistance.
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